That is true for any EULA, regardless of Publisher or whether it′s a hardcopy or not.
more accurately would be ~100 megs. But that′s still less than Origin uses for example. Which usually uses up around 130 - 150megs.
That′s ram usage of steam after a fresh start:
Bootstrapper ~65megs
Service ~3megs
2x Webhelper ~9megs combined
There have always been bugs with offline mode. However most of the time its due to a user being online whilst trying to start steam in offline mode. I mentioned before that irregardless of launchmethod, with an active connection, steam will still phone home, especially with steamguard active. That can easily lead to offline mode bugging the hell out. I had that happen myself btw, but it was a long time ago.
If the installer enforces you to go online, than thats the installers fault and not steams. I installed HL2 completely offline. I installed Darksiders completely offline. I installed Skyrim completely offline. I installed Cliffs of Dover completely offline. I only had to go online to activate them, but not during the installation process. If you however meant the steam and not the game installer, again, that′s actually the publishers fault for not including the full installer for steam on the disc.
Judging from your post I′ll assume you were online? If so, read my reply to Nicho. But yes, Steams offline mode will bug out from time to time. I had it happen to me once a long time ago.